At those prices with only a 6-7000 KM OCI, I advise neither. Find a brand name filter under about $5. Are your short intervals for a particular reason, such as the car being a short hopper or....???
Are you are talking an ordinary Wix @ $9 CND. That seems steep considering the USD exchange is close to 1:1 now. A regular Wix is no more than about $5 around here. $15 is about what an RP costs here, so this is a strange price disparity.
The RP will filter better, about 99% @ 20 microns per ISO 4548-12, versus about 85 percent for the Wix (may differ slightly according to actual part number). That might be be a benefit to your engine but you won't see it for about 500,000 KMs with such short intervals.
Options... extend the OCI or change the filter every other oil change.
You are wrong about the Frams... especially the Ultra. I don't buy any low end filter, Fram orange included, but the Ultra is a magnificent filter... as good or better than any other premium filter you can name and in any aspect you care to talk about.